Machine for cleaning blackboard-erasers.



No. 754,220. PATENTED MAR. a, 1904. J. A. JONES. MACHINE FOR CLEANINGBLAOKBOARD BRASERS.

APPEIGA'IION FILED AUG. 12. 1903.

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Gttouwq Wibmeooao No.754,220. PATENTED MAB.8,1904.,

J. A. JONES.

MACHINE FOR CLEANING BLAGKBOARD ERASERS. APPLICATION rmzn AUG. 12, 1903.

No. 754,220. I PATENTBD MAR. s, 1904.

J A. JONES. MACHINE FOR CLEANING BLAGKBOARD ERASERS.

APYLIOATION FILED AUG. 12, 1903.

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No. -754120.. PATENTED ARJs, 1904.

' J A. JONES.

MACHINE FOR'GLEANING BLACKBOARD BRASERS. APPLICATION FILED AUG.12, 190a.

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1pm U 5mm UNITED STATES Patented March 8, 1904.

PATE T OFFICE.

JAMES A. JONES, OF PLYMOUTH, INDIANA.

MACHINE FOR CLEANING BLACKBOARD-ERASERS.

SPECIFICATION forming part of Letters Patent N0. 754,220, dated March 8,1904.

Application filed August 12, 1903.

To all whom it may concern.-

Be it known that I, JAMES A. J ONES, a citizen of the United States,residing at Plymouth, in the county of Marshall and State of Indiana,have invented certain new and useful Improvements in Machines forCleaning Blackboard- Erasers; and I do hereby declare the following tobe a full, clear, and exact description of the invention, such as willenable others skilled in the art to which it appertains to make and usethe same.

My invention relates to machines for cleaning blackboard-erasers, hasfor its obj eot economy in construction and cleanliness, and consists incertain improvements on the machine shown in Patent No. 699,957, grantedto me on the 13th day of May, 1902, which improvements will be fullydisclosed in the following specification and claims.

In the accompanying drawings, which form part of this specification,Figure 1 represents a vertical longitudinal section on line 1 1, Fig. 2,of my improved machine; Fig. 2, a vertical transverse section on line 22, Fig. 1; Fig. 3, a rear end elevation of the machine removed from itscase or box; Fig. 4, a side elevation of the same; Fig. 5, a plan viewon line 5 5, Fig. 1; Fig. 6, a perspective of the eraser-holderdetached; Fig. 7, a perspective of the machine incased, and Fig. 8 aperspective of the crank.

Reference being had to the drawings and the designating charactersthereon, 1 indicates an inclosing case or box in which the machine issupported and whose cover 2 is hinged thereto, and the case is providedwith an ingress passage 3 at one end thereof for the introduction oferasers 4 and an egresspassage 5 at the opposite end of the case and inline with the passage 3. On the inside of passage 3 is a door 6, havinga retaining-spring 7, and on the outside of passage 5 is a door 8,having a retaining-spring 9, which springs normally hold the doors orcovers to their seats and prevent the escape of dust. The door 6 isopened by the person operating the machine by pushing an eraser throughthe opening 3, and the door 8 is opened automatically by the erasersdischarged from the machine.

10 indicates the base or bed plate of the ma- $erial No. 169,227. (Nomodel.)

chine, having vertical flanges 11 on each side and on the upper surfacethereof to guide erasers on their way through the machine and isprovided with openings 12, 13, and 14, in which the erasers come incontact, respectively, with brushes 15 16 17 and roll 18, having a cover19, of cloth, to engage the erasers and move them along toward thedischarge opening or passage 5. The brushes engaging the surface of theerasers remove the loose matter thereon and are supported, respectively,on shafts 20, 21, and 22 and the roll 18 on shaft 23, which crosses thebed-plate transversely, and are supported in lugs 24, 25, 26, and 27 onthe lower side thereof.

28 29 are brackets bolted to the upper surface of the bed-plate, onopposite sides thereof, and support the driving-shaft 30 inbearings 3131, and in thearms 51 the shaft 50 is supported, andin arms 34 issupported shaft 35. On shaft 30 is the main sprocket-wheel 36, and onshaft 35 is the small sprocket-wheel 37, engaged by a chain 38 andpulley 39, engaged by a belt 40, which engages pulleys 41, 42, 43, 44,and (see Fig. 4) and drives the shafts supporting the brushes 15 16.17and roll 18. On shaft 35 is also a cam having arms 46 47, which in theirrotations engage the arm 48 of a lever 49 on shaft 50, supported in arms51 of the brackets, and to the outer end of arm 52 of. lever 49 isconnected a rod 53 by swinging links 54 54 to preserve the verticalalinement ofsaid rod, and to the lower endof the rod, is attached atransverse bar 55, having guide-flanges 56 on its ends, which engage thevertical posts or rods 57 57, secured to the bed-plate, and betweenwhich posts the bar 55 is reciprocated.

56 is the eraser-holder, which is connected to the bar 55 and isreciprocated thereby, and the eraser-holder is provided with a spring 57secured thereto to extend down over its sides, as shown in Figs. 3 and6, to engage an eraser and securely hold it in place on the holder whileit is'being beaten, and the erasers are automatically released afterthey have been beaten by rods 58, which are supported on the sides ofthe eraser-holder and have right-angled ends 59, which engage thespring. The opposite ends of said rods are provided with crank-arms 60,connected by a wire 61, and the wire is connected to an elongatedtrip-rod 62, whose lower end passes down into the brush 16 while aneraser is being beaten on the bed-plate and strikes against the uppersurface of an oncoming eraser toward the holder 56 and turns the rods 58on their axes, which causes the ends 59 to press the spring 57 u outfrom the holder and releases the erasers. The bars 63 in the opening 13prevent the eraser from tipping endwise while the trip-rod 62 is actingupon the upper concave surface of the oncoming eraser.

The lower face 64 of the holder is convex in cross-section to fit theupper surface of the eraser, and the trip-rod 62 is guided in itsreciprocation in passages 65 and 66 in the holder.

On the driving-shaft 30 are a fiy-wheel 30 and oppositely-arranged mitergear-wheels 67 68, which latter engage like wheels 69 70 on verticalshafts 71 72, supported in brackets 73 74: (see Figs. 1, 2, and 3) onthe bed-plate and 'on which shafts are friction-rollers 75 7 6, whichengage the sides of an eraser and move it along across the brush 16 anduntil it is engaged by the eraser-holder 56. The lower ends of theshafts 71 72 extend into transverse slots 77 7 8,in the bed-plate toallow the shafts and the rolls 75 7 6'to separate to receive an eraserand are returned and the rollers pressed against the sides of the eraserby springs 7 9 80, bearing against the outside of said shafts as theshafts and the rollers are revolved by the miter gear-wheels 67 68.

The erasers are fed to the machine by the operator until the rollers 7576 engage their sides, after which they are carried through the machineautomatically and are held down upon the roll 18 by a spring 81, and thedust from the erasers falls into a drawer 82 and is removed from thecase.

The shaft 30 is revolved by a crank 83, whose shank 84 extends into thecase 1.

The upper ends of the posts 57 are connected by a transverse bar 85, andon the rod 53 between said bar and the bar 55 is a spirallycoiled spring66, which is compressed in the upstroke of the eraser-holder andforcibly projects the holder and its eraser downward to beat the eraserwith each revolution of the machine.

Having thus fully described my invention, what I claim is 1. Aneraser-cleaner having a bed-plate provided with openings, lugsprojecting from the under side of the bed-plate, and brushes on shaftssupported in said lugs and extending through said openings; incombination with an eraser-holder, brackets above and on opposite sidesof the bed-plate, a power-shaft supported on said brackets, mitergear-wheels on said shaft, vertical shafts having gearwheels engaged bythe wheels on the powershaft and laterally rrfovable at their lowerends, and friction-rollers on said vertical shafts to engage erasers.

2. An eraser-cleaner having a bed-plate provided with openings, brushesfor cleaning an eraser through said openings, feed-rollers for engagingthe sides of an eraser and having shafts laterally movable at one end, aspring engaging each shaft, and an eraser-holder; in combination with apower-shaft, connections for raising said holder and connections forre-.

Volving said rollers.

3. An eraser-cleaner having a bed-plate,vertical brackets above and onopposite sides of the bed-plate and having bifurcated arms, apower-shaft supported in the brackets below said arms, a shaft providedwith a pulley and a cam and supported in one of the arms of saidbrackets, and a shaft provided with a lever engaged by said cam andsupported in the other arms of said brackets; in combination with aneraser-holder.

4. An erasercleaner, having an eraserholder, vertical posts, atransverse bar secured to the upper end of said posts, a transverse barvertically movable between the posts and to which said eraser-holder issecured, a rod connected to the movable bar, and a spring on the rodbetween said bars; in combination with means for raising theeraser-holder.

5. An eraser-cleaner consisting of a case having openings opposite eachother in the ends thereof, a horizontal bed-plate between and in linewith said openings, an eraserholder, means for beating erasers, meansfor brushing the erasers, and means for automatically moving the erasersfrom the holder through the egress-opening.

In testimony whereof Iafiix my signature in presence of two witnesses.

JAMES A. JONES.

Witnesses:

SMITH N. STEVENS, PERRY O. J ONES.

